الفهرس 
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Abstract
Summary
This study aims to optimize the benefits from the water of the flash
flood occurred in desert areas such as Sinai, Saint Catherin area in Al
Arbaeen valley.
In that area a mountain lake was constructed by building an industrial
wall, it’s length is 20 m, height 3 m and is supported by two stentings along
the wall. This lake was used to harvest the flash flood water. The industrial
wall was constructed depending on hydrological study and mathematical
models that used to identify the quantities of rainfall water that expected to
fall during the different return periods 2, 5, 10, 25, 50 and 100 years. The
model Watershed Modeling System (WMS) was used to identify the
quantities of the rainfall.
During the year of 2016, after the mountain lake was constructed, the
rainfall was harvested and the water was used in agriculture beside the
domestic purposes.
Tow greenhouses were constructed with an area of 270 m2 for each
one. The first was cultivated with tomato while the second was cultivated
with cucumber.
Environmental Impact Assessment Matrix was established to clear the
impact of this study on economical, social, healthy and biodiversity.
The results clear the following:
The predicated quantities of water that calculated were 2606.4, 61434,
136602.9, 264409.2, 380076.3, 507030.3 m3. Duration periods of 2, 5, 10,
25, 50 and 100 years respectively.
Summary
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The quantities of water that used to irrigate tomato and cucumber were 370.2,
380.3 m3/ sec respectively. Two liner equation were established as follow
y = 24.093x - 16.983 for tomato, where R² = 0.9994
y = 12.919x - 34.633 for cucumber, where R² = 0.959
The productivities of the two crops / feddan were 4.3 and 5.2 Ton for tomato
and cucumber respectively.
The productivity of each crop compared to the quantity of irrigation water
were 11.36 and 15.85 kg/m3 for tomato and cucumber respectively.
The Matrix of Environmental Impact Assessment clears the following:
Economical Aspect: was positive for constructing the mountain lake and use
the harvested water in irrigation.
Social Aspect: was positive for the resettlement of the people of Sinai beside
the water.
Health Aspect: providing clean water for domestic purpose.
Biodiversity Aspect: the residual of crops may encourage the occurrence of
birds and animals.